//# include <stdio.h>
//# include <conio.h>
//# include <math.h>
//void main()
//{double y,x,a,b;
//printf("x=");scanf("%lg",&x);
//printf("a=");scanf("%lg",&a);
//printf("b=");scanf("%lg",&b);
//if ((x>0)&&(b<a))
//	y=pow(sin(pow(a,2)-pow(b,2)),2);
//else
//	y=cos(a+b)-exp(x);
//printf("y=%lg",y);
//getch();
//}
